如何通过Django Rest框架返回嵌套json

Question

我在postgres数据库中有这样的数据

我想创建rest api来像这样返回嵌套的json

[
{
    "machine": "MC1",
    "work"   : [
                 {
                    "title": "21TCE20200910",
                    "subTitle1": "INSERT CORE",
                    "subTitle2": "P20200910-001",
                    "subTitle3": "DRAW20200910",
                    "status": 0,
                    "delay": 2
                 },
                 {
                    "title": "21TCE20200910",
                    "subTitle1": "INSERT CORE",
                    "subTitle2": "P20200910-001",
                    "subTitle3": "DRAW20200912",
                    "status": 1,
                    "delay": 1
                 }
               ]
    
},
{
    "machine": "MC2",
    "work"   : [
                 {
                    "title": "21TCE20200911",
                    "subTitle1": "SCREW",
                    "subTitle2": "P20200910-001",
                    "subTitle3": "DRAW20200910",
                    "status": 1,
                    "delay": 2
                 }
               ]
    
},
{
    "machine": "MC3",
    "work"   : [
                 {
                    "title": "21TCE20200913",
                    "subTitle1": "INSERT FIX",
                    "subTitle2": "P20200910-001",
                    "subTitle3": "DRAW20200910",
                    "status": 0,
                    "delay": 1
                 }
               ]
    
}

]

目前，我只能为每条记录返回普通json，但我想分组并返回嵌套json，如有任何帮助，将不胜感激

下面是我的代码model.py

    from django.db import models
    class MachineSchedule(models.Model):
        machine = models.CharField(max_length=255)
        title   = models.CharField(max_length=255)
        subTitle1 = models.CharField(max_length=255)
        subTitle2 = models.CharField(max_length=255)
        subTitle3 = models.CharField(max_length=255)
        status = models.IntegerField(1)
        delay = models.IntegerField(1)

views.py

    from django.shortcuts import render
    from rest_framework import generics
    from .models import MachineSchedule
    from .serializers import MachineScheduleSerializer
    class MachineScheduleListAPIView(generics.ListCreateAPIView):
        serializer_class = MachineScheduleSerializer
          model = MachineSchedule
            fields = '__all__'

序列化程序.py

    from rest_framework import serializers
    from .models import MachineAllocate
    
    class MachineAllocateSerializer(serializers.ModelSerializer):
        class Meta:
            model = MachineAllocate
            fields = '__all__'

Answer 1

#models
class Work(models.Model):
title   = models.CharField(max_length=255)
subTitle1 = models.CharField(max_length=255)
subTitle2 = models.CharField(max_length=255)
subTitle3 = models.CharField(max_length=255)
status = models.IntegerField(1)
delay = models.IntegerField(1)

class MachineSchedule(models.Model):
machine = models.CharField(max_length=255)
work = models.ForeignKey(Work, on_delete=models.CASCADE, related_name='work')

#serializer
from rest_framework import serializers
from .models import *

class WorkSerializer(serializers.ModelSerializer):
class Meta:
    model = MachineAllo
    fields = '__all__'

class MachineScheduleSerializer(serializers.ModelSerializer):
work = WorkSerializer(many=True)
class Meta:
    model = MachineAllo
    fields = '__all__'

#views
from rest_framework import generics
from .models import MachineSchedule
from .serializers import MachineScheduleSerializer

class MachineScheduleListAPIView(generics.ListCreateAPIView):
serializer_class = MachineScheduleSerializer
model = MachineSchedule
fields = '__all__'